US4438949A - Automatically fastening seatbelt system - Google Patents

Automatically fastening seatbelt system Download PDF

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Publication number
US4438949A
US4438949A US06/309,509 US30950981A US4438949A US 4438949 A US4438949 A US 4438949A US 30950981 A US30950981 A US 30950981A US 4438949 A US4438949 A US 4438949A
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US
United States
Prior art keywords
guide rail
anchor plate
plate
lock
engageable
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US06/309,509
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English (en)
Inventor
Hiroshi Tsuge
Mitsuaki Katsuno
Yuji Nishimura
Tatsushi Kubota
Tadao Yamada
Yoshihiro Hayashi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tokai Rika Co Ltd
Original Assignee
Tokai Rika Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tokai Rika Co Ltd filed Critical Tokai Rika Co Ltd
Assigned to KABUSHIKI KAISHA TOKAI-RIKA-DENKI-SEISAKUSHO reassignment KABUSHIKI KAISHA TOKAI-RIKA-DENKI-SEISAKUSHO ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: HAYASHI, YOSHIHIRO, NISHIMURA, YUJI, YAMADA, TADAO, KATSUNO, MITSUAKI, KUBOTA, TATSUSHI, TSUGE, HIROSHI
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R22/00—Safety belts or body harnesses in vehicles
    • B60R22/04—Passive restraint systems, i.e. systems both applied and removed automatically, e.g. by movement of the vehicle door
    • B60R22/06—Passive restraint systems, i.e. systems both applied and removed automatically, e.g. by movement of the vehicle door having the belt or harness connected to a member slidable in a vehicle-mounted track

Definitions

  • This invention relates to an automatically fastening seatbelt system capable of automatically fastening occupant-restraining-webbings about an occupant in an emergency of the vehicle.
  • the present invention has been developed in view of the abovedescribed disadvantage of the prior art and has as its object the provision of an automatically fastening seatbelt system enabling the occupant to release the restraining webbings from driving means on demand.
  • an anchor plate engaged with one of restraining-webbings is connected through a support device to a driving force transmitting member and made movable along a guide rail, whereby the webbings are automatically fastened to an occupant, a release device is provided at a predetermined position in the longitudinal direction of the guide rail, and the operation of the support device is released by the operation of the release device to release the anchor plate from the guide rail.
  • FIG. 1 is a perspective view showing a first embodiment of the automatically fastening seatbelt system according to the present invention
  • FIG. 2 is a perspective view showing the essential portions of FIG. 1;
  • FIG. 3 is a sectional view taken along the line III--III in FIG. 2;
  • FIG. 4 is a sectional view taken along the line IV--IV in FIG. 3;
  • FIG. 5 is a disassembled perspective view showing the opposed relation of the support plate to the anchor plate;
  • FIG. 6 is a partial sectional view showing the sprocket housing
  • FIG. 7 is a sectionalview corresponding to FIG. 3 showing a second embodiment of the present invention.
  • FIG. 8 is a sectional view taken along the line VIII--VIII in FIG. 7;
  • FIG. 9 is a perspective view showing the correlation between the lock block and the anchor plate.
  • FIG. 10 is a sectional view corresponding to FIG. 3 showing a third embodiment of the present invention.
  • FIG. 11 is a sectional view taken along the line XI--XI in FIG. 10;
  • FIG. 12 is a sectional view corresponding to FIG. 3 showing a fourth embodiment of the present invention.
  • FIG. 13 is a sectional view taken along the line XIII--XIII in FIG. 12;
  • FIG. 14 is a perspective view showing the correlation between the release plate and the bottom surface of the anchor groove
  • FIG. 15 is a sectional view corresponding to FIG. 3 showing a fifth embodiment of the present invention.
  • FIG. 16 is a disassembld perspective view showing the essential portions of FIG. 15.
  • FIG. 1 shows a first embodiment of the automatically fastening seatbelt system according to the present invention, in which an occupant sitting in a seat 10 is adapted to be brought into a three-point seatbelt fastened state by means of an outer webbing 12 and an inner webbing 14.
  • One end of the outer webbing 12 is engaged with an anchor plate 16, which is guided by a guide rail 20 laid along a roof side 18 of a vehicle body and movable back and forth in the vehicle. While, the other end of the outer webbing 12 is secured to the lower rear portion of a door 24 through a rotary anchor plate 22, and the intermediate portion of the outer webbing 12 extends through a through-ring 26, which is slidably guided by a guide rail 28 laid on the door 24 from the lower rear portion to the upper forward portion thereof.
  • a portion of the outer webbing 12 between the through-ring 26 and the anchor plate 16 extends through a joint 30, which is engaged with the forward end portion of the inner webbing 14.
  • the base portion of this inner webbing 14 is wound into a retractor 32 by an urging force thereof.
  • This retractor 32 incorporates therein an inertia lock mechanism for abruptly stopping the wind-out of the inner webbing 14 in an emergency of the vehicle.
  • the guide rail 20 supporting the outer webbing 12 through the anchor plate 16 has the forward end portion in the longitudinal direction thereof descending along a front pillar 34 of the vehicle body and the rear end portion in the longitudinal direction thereof which is bent at substantially right angle to be suspended along a center piller 36.
  • the guide rail 20 in its cross section perpendicular to the longitudinal direction thereof, has an anchor groove 38 and a slide groove 40 in substantially parallel to each other, and these grooves are formed over the entire length of the guide rail 20.
  • Inserted in this anchor groove 38 is a slide shoe 44 provided at an end portion of a support plate 42, thus an external force applied to the support plate 42 is transmitted through the slide shoe 44 to the guide rail 20 to be supported by the guide rail 20.
  • a flexible tape 46 as a driving force transmitting member, in which a plurality of openings 48 are formed at suitable intervals in the longitudinal direction thereof. Inserted through one of these openings 48 is the intermediate portion of the support plate 42 to be engaged with the flexible tape 46.
  • this support plate 42 which has extended through the flexible tape 46, is bent to be a substantially U-shape to hold a lock plate 50, the support plate 42 and the lock plate 50 constituting support means for the anchor plate 16.
  • a first bent portion 54 being bent at a right angle is extended from a back plate 52 of the support plate 42 holizontally, further a second bent portion 56 is extended from the first bent portion 54 being further bent at a right angle therewith and in parallel to the back plate 52, and projections 60 constituting fulcrums for the rotation of the lock plate 50 are inserted into support holes 58 formed at positions close to the opposite ends of the first bent portion 54.
  • a guide hole 62 formed at substantially at the center of the first bent portion 54 is a guide hole 62, through which is extended an engageable projection 64 of the anchor plate 16.
  • the lock plate 50 is provided thereon with a lock projection 68 engageable with an engageable hole 66 of the engageable projection 64, which has been extended through the guide hole 62, and this lock projection 68 is urged by a sheet spring 70 fixed to the back plate 52 of the lock plate 50 in a direction toward the second bent portion 56 to be engageable with the engageable hole 66.
  • a sheet spring 70 fixed to the back plate 52 of the lock plate 50 in a direction toward the second bent portion 56 to be engageable with the engageable hole 66.
  • Formed at the opposite end portions of this lock plate 50 are abutting portions 72, and, when these abutting portions are pushed towards the back plate 52, the lock projection 68 is separated from the engageable hole 66 to release the anchor plate 16 from the guide hole 62 of the engageable projection 64, whereby the anchor plate 16 is disengaged from the support plate 42, so that an occupant can be released from the outer webbing 12.
  • Pushing pins 74 shown in FIG. 3 are secured to the forward and rear end portion, as viewed in the vehicle, of the guide rail 20 and opposed to the abutting portions 72 of the lock plate 50.
  • Each of these pushing pins 74 constitutes release devices of the support means, and is normally separated from the abutting portions 72 by an urging force of a compression coil spring 76 interposed between the guide rail 20 and itself, however, when the support plate 42 reaches the forward or rear end portion, as viewed in the vehicle, of the guide rail 20, if the pushing pin 74 is pushed into the guide rail 20 to abut onto the abutting portion 72 by the occupant, whereby the lock plate 50 is rotated due to the abutting pressure applied to the abutting portions 72, so that the lock projection 68 of the lock plate 50 can be released from the engageable hole 66.
  • limit switches 77A and 77B are secured to the forward and rear portions, as viewed in the vehicle, of the guide rail 20, respectively, and electrically connected to control means, not shown.
  • the limit switch 77A is adopted to abut against the support plate 42 to detect a state of the support plate 42 having reached the end portion of the guide rail 20, and the limit switch 77B to abut against the anchor plate 16 to detect the anchor plate 16 not having been released.
  • a tape track 78 is connected to the rear end portion as viewed in the vehicle of the guide rail 20 and communicated with the slide groove 40 of the guide rail 20.
  • the other end of this tape track 78 is communicated with a sprocket housing 80 solidly secured to the lower portion of the center pillar 36.
  • the flexible tape 46 extends through the slide groove 40 and the tape track 78 and is meshed at its openings 48 with a sprocket wheel 84 pivotally supported by a shaft 82 in a sprocket housing 80.
  • This sprocket wheel 84 is connected through decelerating means, not shown, to a motor 86 to be rotated by a driving force of the motor 86, whereby the flexible tape 46 is moved in the longitudinal direction thereof by the motor 86.
  • the motor 86 when the door 24 is closed, rotates the sprocket wheel 84 by a given number of revolutions in the clockwise direction in FIG. 6, and, when the door is opened, rotates the sprocket wheel 84 by a given number of revolutions in the counterclockwise direction. Additionally, the motor 86 is not fed with an electric current thereto while the limit switch 77B (Refer to FIG. 4) is not abutted against the anchor plate 16.
  • This tape track 88 is Connected to this sprocket housing 80 in a direction opposite to the tape track 78 .
  • This tape track 88 enters the door 24 from the forward end portion of the door 24, and connected to the guide rail 28 in the door to guide the extension of the flexible tape 46 into this guide rail 28.
  • This guide rail 28 is of an arrangement similar to the guide rail 20 solidly secured to the roof side of the vehicle body, and adapted to move the through-ring 26 to the forward or rear end portion, as viewed in the vehicle, of the door 24 due to the movement of the flexible tape 46.
  • FIG. 1 showing the driver's seat
  • the door is opened for allowing the occupant to enter the vehicle.
  • the anchor plate 16 has been moved to the forward end portion, as viewed in the vehicle, of the guide rail 20 and the through-ring 26 has been moved to the forward end portion, as viewed in the vehicle, of the door 24 to separate the outer webbing 12 from the seat 10, whereby a space for allowing the occupant to enter the vehicle is formed between the outer webbing 12 and the seat 10.
  • the motor 86 rotates the sprocket wheel 84 in the clockwise direction in FIG. 6, whereby the flexible tape 46 moves the anchor plate 16 to the rear end portion, as viewed in the vehicle, through the support plate 42, and similarly, moves the through-ring 26 along the door 24 to the rear end portion in the vehicle.
  • the retractor 32 winds up an excessive portion of the inner webbing 14, whereby the joint 30 moves to a position close to the retractor 32, so that the occupant can be automatically brought into a three-point seatbelt fastened state by the outer webbing 12 and the inner webbing 14.
  • a portion of the outer webbing 12 between the anchor plate 16 and the joint 30 functions as a shoulder webbing and another portion of the outer webbing 12 between the joint 30 and the anchor plate 22 as a lap webbing.
  • the inertia lock mechanism incorporated in the retractor 32 abruptly stops the wind-out of the inner webbing, so that the occupant can be positively restrained to avoid colliding against dangerous obstacles.
  • the anchor plate 16, as shown in FIG. 3 is positively supported by the guide rail 20 through the support plate 42, whereby a tensile force acting on the outer webbing 12 is reliably imparted to the roof side 18 of the vehicle body through guide rail 20, thereby enabling to secure the occupant safely.
  • the pushing pin 74 provided at the forward end portion, as viewed in the vehicle, of the guide rail 20 is pushed into the guide rail 20 when the door is opened and the pushing pin 74 provided at the rear end portion, as viewed in the vehicle, of the guide rail 20 is pushed into the guide rail 20 when the door is closed, the projection 68 of the lock plate 50 is disengaged from the anchor plate 16, whereby the anchor plate 16 falls off from the support plate 42, so that the occupant can make large actions in the compartment of the vehicle to carry out a necessary work.
  • the operation of pushing the pushing pin is also applicable to the case where the occupant escapes to outside of the vehicle after the collision of the vehicle.
  • the motor 86 does not operate when the anchor plate 16 is in a released state, so as not to permit the flexible tape 46 to move.
  • the engageable projection 64 is inserted into the guide hole 62, then the lock projection 68 of the lock plate 50 is inserted into the engageable hole 66 by the urging force of the sheet spring 70, so that the anchor plate 16 can be easily and reliably engaged with the lock plate 50.
  • FIGS. 7 and 8 show a second embodiment of the present invention, in which the anchor plate 16 is extended upwardly longer than the anchor plate in the first embodiment, and the engageable projection 64 formed at the forward end portion of the anchor plate 16 is directly inserted into the opening 48 of the flexible tape 46.
  • the engageable hole 66 is formed at the intermediate portion of this anchor plate 16, and a lock block 92 constituting the support means is engaged with this engageable hole 66.
  • a guide hole 94 formed at the intermediate portion of the lock block 92 is a guide hole 94 having rectangular shape in a cross-section, the length of the shorter side thereof is longer than the thickness of the anchor plate 16.
  • a lock projection 96 is projected from one of the inner surface of the guide hole 94.
  • the lock projection 96 has a projection height larger than the thickness of the anchor plate 16, and the distance between the forward end of the projection 96 and the opposite inner surface is wider than the thickness of the anchor plate.
  • This lock block 92 with the lock projection 96 thereof being inserted into the engageable hole 66 of the anchor plate 16 is movable in the anchor groove 38 of the guide rail 20 together with the anchor plate 16.
  • the pushing pins 74 are provided at the forward and rear portions, as viewed in the vehicle, of the guide rail 20 and opposed to the lock block 92.
  • a cut-away portion 99 is formed at a portion of the guide rail 20 on the side opposite the pushing pin 74 with respect to the lock block 92, and has dimensions sufficient for receiving the lock block 92.
  • An urging plate 102 urged by a compression coil spring 100 is provided in this cut-away portion 99 and urges the lock block 92 towards the pushing pin 72.
  • Limit switches 77A and 77B are provided at the forward and rear end portions, as viewed in the vehicle, of the guide rail 20 and are in contact with the lock block 92 and the anchor plate 16, respectively.
  • the lock projection 96 of the lock block 92 is engaged with the engageable hole 66 of the anchor plate 16, whereby the anchor plate 16 is prevented from being released from the flexible tape 46, with the result that the anchor plate 16 together with the lock block 92 and the flexible tape 46 move along the guide rail 20, so that the webbings can be automatically fastened about or released from the occupant.
  • a tensile force generated in the webbings is imparted to the guide rail 20 through the lock block 92, so that the occupant can be securely restrained.
  • the lock block 92 moves to the left in FIG. 7, whereby the guide hole 94 comes into register with the anchor plate 16 to let the anchor plate 16 to fall off from the flexible tape 46 and the lock block 92, so that the webbings can be released from the occupant. Additionally, in this embodiment, as an engageable projection 64 provided at a position adjacent the forward end of the anchor plate 16 is guided by the lock block 92, the anchor plate 16 is smoothly movable.
  • FIGS. 10 and 11 show a third embodiment of the present invention, in which, as differences from the abovedescribed second embodiment, the flexible tape 46 is disposed between the lock block 92 and the outer webbing 12, so that this lock block 92 can impart to the guide rail 20 an external force applied from the anchor plate 16 via a shoe 104 movable along the guide rail 20 together with the anchor plate 16.
  • FIGS. 12 and 14 show a fourth embodiment of the present invention, in which the dislocation of the anchor plate 16 from the flexible tape 46 is prevented by a large-diameter pin 110 and a small-diameter pin 112, both of which extend through the intermediate portion of the anchor plate 16.
  • pins 110 and 112 are movable in the slide groove 38 of the guide rail 20 and disposed on a release plate 114 when they reach the forward or rear end portion of the guide rail 20.
  • This release plate 114 is provided therein with a first cutin 116 for receiving the anchor plate 16 at the intermediate portion of the first cutin 116, a second and a third cutins 118 and 120 for allowing the large-diameter pin 110 and the small-diameter pin 112 to be inserted therethrough, respectively.
  • This release plate 114 by an urging force of a compression coil spring 122, normally disposes the second and third cutins 118 and 120 out of the scope of movement of the large-diameter and small-diameter pins 110 and 112, and, when the release plate 114 is pushed into the guide rail 20 against the urging force of the compression coil spring 122, causes the second and third cutins 118 and 120 to come into register with the pins 110 and 120, so that the anchor plate 116 can be released from the guide rail 20.
  • the forward end portion 124 of the release plate 114 is superposed on the guide rail 20, as viewed sideways from the guide rail 20, so that the pins 110 and 112 can be smoothly moved from the bottom surface 126 onto the release plate 114.
  • the limit switch 77B comes into contact with the anchor plate 16 when the anchor plate 16 is positioned at the forward or rear end portion as viewed in the vehicle.
  • this fourth embodiment also, the occupant pushes the release plate 114 into the guide rail 20 on demand, whereby the anchor plate 16 is released from the guide rail 20, so that the webbings can be released from the occupant.
  • FIGS. 15 and 16 show a fifth embodiment of the present invention, in which a lock pin 128 performs a function to engage the anchor plate 16 with the flexible tape 46.
  • this lock pin 128 has an elliptical cross section, and is inserted through the engageable hole 66 of the anchor plate 16, which has extended through one of the openings 48 of the flexible tape 46, so as to hold the anchor plate 16 and the flexible tape 46 in an engagement.
  • the pushing pin 74 is made smaller in diameter than this lock pin 128.
  • a stopper 130 being in contact with the top end of the anchor plate 16 is guided into the guide 132 fixed to the guide rail 20 and movable in a direction perpendicular to the longitudinal direction of the guide rail 20.
  • This stopper 130 is urged against the anchor plate 16 by an urging force of a compression coil spring 134, and, when the anchor plate 16 is released, is inserted into an anchor plate guide hole 138 of a support block 136 extended through one of the openings 48 of the flexible tape 46, so that the support block 136 and the flexible tape 46 can be prevented from moving.
  • this stopper 130 is formed at the forward end thereof with a semi-circular cut-away portion 140 so that the stopper 130 at its lower position does not interfere with the pushing pin 74.
  • the limit switch 77B is opposed to the stopper 130 for operating, when the stopper moves, to detect a released state of the anchor plate 16.
  • the stopper 130 extends through one of the openings 48 of the flexible tape 46 to be inserted into the guide hole 138 of the support block 136, whereby, even in the released state of the anchor plate 16, the flexible tape 46 and the support block 136 are not moved relative to the guide rail 20, and, when the occupant inserts the anchor plate 16 into the guide hole 138 of the support block 136 again, whereby the engaged state shown in FIG. 15 is brought about, so that the anchor plate 16 can be positively connected to the flexible tape 46.
  • the anchor plate 16 is made released at the forward or rear end portion as viewed in the vehicle of the guide rail 20, however, the releasing can be easily changed to be made at the intermediate portion of the guide rail 20 so that occupant can release the anchor plate 16 at the intermediate portion as necessary.
  • the anchor plate is opposed to the release device at the stroke end of the normal stroke, along which the anchor plate moves so as to automatically fastening the webbings about the occupant, however, it is possible that this release device is disposed out of the normal stroke, so that, as necessary, the occupant can move the anchor plate out of the normal stroke to bring the anchor plate into opposed relation to the releasing means.
  • the automatically fastening seatbelt system of the present invention can offer such an outstanding advantage that the anchor plate is made released from the guide rail by the release device, so that the occupant can be released from the automatically fastened seatbelt system on demand to do necessary works.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Automotive Seat Belt Assembly (AREA)
  • Seats For Vehicles (AREA)
US06/309,509 1980-10-15 1981-10-07 Automatically fastening seatbelt system Expired - Fee Related US4438949A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP55-143974 1980-10-15
JP55143974A JPS5770752A (en) 1980-10-15 1980-10-15 Automatic releasing device for seat belt

Publications (1)

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US4438949A true US4438949A (en) 1984-03-27

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Family Applications (1)

Application Number Title Priority Date Filing Date
US06/309,509 Expired - Fee Related US4438949A (en) 1980-10-15 1981-10-07 Automatically fastening seatbelt system

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US (1) US4438949A (enrdf_load_stackoverflow)
JP (1) JPS5770752A (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120326486A1 (en) * 2010-03-11 2012-12-27 Mbi Co., Ltd. Apparatus for automatically locking and unlocking a vehicle seat belt

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60190451U (ja) * 1984-05-28 1985-12-17 ハリマセラミック株式会社 鋳造用ノズル

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4225155A (en) * 1977-11-04 1980-09-30 Volkswagenwerk Aktiengesellschaft Passive safety device for securing occupants of vehicles, in particular motor vehicles
US4252343A (en) * 1978-08-18 1981-02-24 Toyota Jidosha Kogyo Kabushiki Kaisha Anchor device for seatbelt systems
US4257625A (en) * 1978-10-31 1981-03-24 Juichiro Takada Input coupling to a motion amplifier for use in door-actuated seat belt systems
US4362321A (en) * 1979-12-21 1982-12-07 Metallwerk Max Brose Gmbh & Co. Device for passive actuation of a safety belt

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4225155A (en) * 1977-11-04 1980-09-30 Volkswagenwerk Aktiengesellschaft Passive safety device for securing occupants of vehicles, in particular motor vehicles
US4252343A (en) * 1978-08-18 1981-02-24 Toyota Jidosha Kogyo Kabushiki Kaisha Anchor device for seatbelt systems
US4257625A (en) * 1978-10-31 1981-03-24 Juichiro Takada Input coupling to a motion amplifier for use in door-actuated seat belt systems
US4362321A (en) * 1979-12-21 1982-12-07 Metallwerk Max Brose Gmbh & Co. Device for passive actuation of a safety belt

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120326486A1 (en) * 2010-03-11 2012-12-27 Mbi Co., Ltd. Apparatus for automatically locking and unlocking a vehicle seat belt

Also Published As

Publication number Publication date
JPS5770752A (en) 1982-05-01
JPS6127213B2 (enrdf_load_stackoverflow) 1986-06-24

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